/* * include/common/defaults.h * Miscellaneous default values. * * Copyright (C) 2000-2010 Willy Tarreau - w@1wt.eu * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation, version 2.1 * exclusively. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef _COMMON_DEFAULTS_H #define _COMMON_DEFAULTS_H /* * BUFSIZE defines the size of a read and write buffer. It is the maximum * amount of bytes which can be stored by the proxy for each session. However, * when reading HTTP headers, the proxy needs some spare space to add or rewrite * headers if needed. The size of this spare is defined with MAXREWRITE. So it * is not possible to process headers longer than BUFSIZE-MAXREWRITE bytes. By * default, BUFSIZE=16384 bytes and MAXREWRITE=BUFSIZE/2, so the maximum length * of headers accepted is 8192 bytes, which is in line with Apache's limits. */ #ifndef BUFSIZE #define BUFSIZE 16384 #endif // reserved buffer space for header rewriting #ifndef MAXREWRITE #define MAXREWRITE (BUFSIZE / 2) #endif #define REQURI_LEN 1024 #define CAPTURE_LEN 64 // maximum line size when parsing config #ifndef LINESIZE #define LINESIZE 2048 #endif // max # args on a configuration line #define MAX_LINE_ARGS 64 // max # args on a stats socket #define MAX_STATS_ARGS 16 // max # of matches per regexp #define MAX_MATCH 10 // max # of headers in one HTTP request or response // By default, about 100 headers per 8 kB. #ifndef MAX_HTTP_HDR #define MAX_HTTP_HDR ((BUFSIZE+79)/80) #endif // max # of headers in history when looking for header #-X #ifndef MAX_HDR_HISTORY #define MAX_HDR_HISTORY 10 #endif // max # of loops we can perform around a read() which succeeds. // It's very frequent that the system returns a few TCP segments at a time. #ifndef MAX_READ_POLL_LOOPS #define MAX_READ_POLL_LOOPS 4 #endif // minimum number of bytes read at once above which we don't try to read // more, in order not to risk facing an EAGAIN. Most often, if we read // at least 10 kB, we can consider that the system has tried to read a // full buffer and got multiple segments (>1 MSS for jumbo frames, >7 MSS // for normal frames) did not bother truncating the last segment. #ifndef MIN_RECV_AT_ONCE_ENOUGH #define MIN_RECV_AT_ONCE_ENOUGH (7*1448) #endif // same, but for writes. Generally, it's enough to write twice: one time for // first half of the buffer, and a second time for the last half after a // wrap-around. #ifndef MAX_WRITE_POLL_LOOPS #define MAX_WRITE_POLL_LOOPS 2 #endif // the number of bytes returned by a read below which we will not try to // poll the socket again. Generally, return values below the MSS are worthless // to try again. #ifndef MIN_RET_FOR_READ_LOOP #define MIN_RET_FOR_READ_LOOP 1460 #endif // the max number of events returned in one call to poll/epoll. Too small a // value will cause lots of calls, and too high a value may cause high latency. #ifndef MAX_POLL_EVENTS #define MAX_POLL_EVENTS 200 #endif // cookie delimitor in "prefix" mode. This character is inserted between the // persistence cookie and the original value. The '~' is allowed by RFC2965, // and should not be too common in server names. #ifndef COOKIE_DELIM #define COOKIE_DELIM '~' #endif #define CONN_RETRIES 3 #define CHK_CONNTIME 2000 #define DEF_CHKINTR 2000 #define DEF_FALLTIME 3 #define DEF_RISETIME 2 #define DEF_CHECK_REQ "OPTIONS / HTTP/1.0\r\n" #define DEF_SMTP_CHECK_REQ "HELO localhost\r\n" #define DEF_HANA_ONERR HANA_ONERR_FAILCHK #define DEF_HANA_ERRLIMIT 10 // X-Forwarded-For header default #define DEF_XFORWARDFOR_HDR "X-Forwarded-For" // X-Original-To header default #define DEF_XORIGINALTO_HDR "X-Original-To" /* Default connections limit. * * A system limit can be enforced at build time in order to avoid using haproxy * beyond reasonable system limits. For this, just define SYSTEM_MAXCONN to the * absolute limit accepted by the system. If the configuration specifies a * higher value, it will be capped to SYSTEM_MAXCONN and a warning will be * emitted. The only way to override this limit will be to set it via the * command-line '-n' argument. */ #ifndef SYSTEM_MAXCONN #ifndef DEFAULT_MAXCONN #define DEFAULT_MAXCONN 2000 #endif #else #undef DEFAULT_MAXCONN #define DEFAULT_MAXCONN SYSTEM_MAXCONN #endif /* Minimum check interval for spread health checks. Servers with intervals * greater than or equal to this value will have their checks spread apart * and will be considered when searching the minimal interval. * Others will be ignored for the minimal interval and will have their checks * scheduled on a different basis. */ #ifndef SRV_CHK_INTER_THRES #define SRV_CHK_INTER_THRES 1000 #endif /* Specifies the string used to report the version and release date on the * statistics page. May be defined to the empty string ("") to permanently * disable the feature. */ #ifndef STATS_VERSION_STRING #define STATS_VERSION_STRING " version " HAPROXY_VERSION ", released " HAPROXY_DATE #endif /* Maximum signal queue size, and also number of different signals we can * handle. */ #ifndef MAX_SIGNAL #define MAX_SIGNAL 256 #endif /* Maximum host name length */ #ifndef MAX_HOSTNAME_LEN #define MAX_HOSTNAME_LEN 32 #endif /* Maximum health check description length */ #ifndef HCHK_DESC_LEN #define HCHK_DESC_LEN 128 #endif #endif /* _COMMON_DEFAULTS_H */